新型混凝土横孔空心砌块砌体受压性能研究

对砌块混凝土设计强度等级为C25~C45的新型混凝土横孔空心砌块及砌体进行受压试验,研究砌块混凝土抗压强度、砌块抗压强度和砌体抗压强度之间的关系.试验结果表明:砌块初裂荷载约为破坏荷载的84%~90%,砌体初裂荷载约为破坏荷载的80%~94%;砌块混凝土每提高一个强度等级,砌块强度提高13%~23%,砌体强度提高13%~30%,且提高幅度逐渐减小.推导了砌块抗压强度平均值计算公式;《砌体结构设计规范》(GB 50003—2011)建议采用的砌体轴心抗压强度平均值计算公式对新型横孔空心砌块砌体并不适用;提出了新型横孔空心砌块砌体轴心抗压强度平均值建议计算公式.

Research on the Compression Behavior of the New Horizontal-hole Hollow Concrete Block Masonry

Through the tests of new horizontal-hole hollow concrete block and masonry on compressive strength when the concrete compressive strength grade is between C25~C45, the compressive strength relationships were studied among the concrete, block and masonry. The experiment results show that the ratio of the crack load to the break load of the block and masonry is 84%~90% and 80%~94% respectively; the compressive strength of the block and masonry increases by 13%~23% and 13%~30%, respectively with the enhancement of concrete compressive strength grade, and the increase slows down gradually; and the average compressive strength formula of the block is derived. It turns out that the compressive strength formula of the masonry recommended by the Code for Design of Masonry Structures (GB 50003-2011) is not applicable for the masonry researched in this paper. The compressive strength formula of the new horizontal-hole hollow concrete block masonry was proposed.